1	"Inflorescences open, irregularly branched; flower buds narrowly conical, twisted; follicles without longitudinal wings"	"Marsdenia schimperi"
1	"Inflorescences more or less umbelliiform; flower buds ovoid or conical; follicles with 4 conspicuous longitudinal winges"	2
2	"Stigmatic heads flat, not exserted beyond the anthers; inflorescences pedunculate"	"Marsdenia rubicunda"
2	"Stigmatic heads with long, rostrate appendage; inflorescences sessile"	"Marsdenia stelostigma"